As someone else has posted for you Edward died July 29, 1947. I suggest getting his obituary. Just like his death certificate it may not have his parents' names but it might at least have surviving siblings. Check with a local library or historical society to see if they can help you.
As far as I know Taft is an English name. If Edward's parents were born in Germany or France it is very possible Taft was not the original spelling or even his surname. This is would explain why he cannot be found in the census before 1910. His marriage record might be helpful if you can find it.